Game of Thrones: S2 Invitation to the Set 10

The Night’s Watch leading their Icelandic horses across the bleak, snowy landscape of Iceland. You can just glimpse James Cosmo as Lord Commander Mormont in the front of the line, talking with Jon Snow.

I continue to wonder if the show will explain how the regular-sized horses the Watch rode from the Wall turn into these much smaller Icelandic horses.